Compatible with the cover kit 1-gang, complete, ref.-no.: xx 401 TSA xx Compatible with the cover 1-gang with symbols, ref.-no.: xx 401 TSAP xxCan be extended by means of a push-button extension module, ref.-no.: 409x TSEMAdapter frames are included in delivery: ref.-no. LS 4 AR for LS range (pre-mounted) and ref.-no. CD 4 AR for CD range. AS / A ranges without adapter frame.Only with the ETS 3.0d version or later versions the full functionality will be available.ETS product family: Push-buttonProduct type: 1-gang push-button1 blue LED: operation indication2 red LED: status indication